Just started receiving this error today.
Norton 360 (from Comcast) will not load, gives the “Norton Security Suite has encountered an error: 8504, 104 and gives no options to proceed further.
I tried in Safe Mode, no luck there.
I resorted to a Restore Point prior to the error, no luck there.
Norton will not uninstall through the Control Point.
Nortin will not reinstall through the Download Manager, no error, just says I have it already installed and will not unistall prior version.
I downloaded the Symantec Diagnostic Tool which throws a number of errors:
Remote Registry Service needs attention
TCP port 139 is not open
TCP port 445 is not open
Administrator account does not have a password (it does)
Your operatnig system version (Windows 10 Professional 64 bit) is not supported